1. Ideal Gas Law CONTINUATION OF THE GAS LAWS

2. What is an ideal gas?  An ideal gas is a gas that behaves and follows the Kinetic Molecular Theory without being affected by real world conditions.  Real world conditions:  Intermolecular forces within gas molecules  Particles contain atomic volume Why have an ideal gas?  An easy theoretical gas scenario to describe the relation of a gas to its environment.

3. Ideal Gas Equation  Select the R constant that has units that are consistent with the units in the question. PV = nRT  Relates all three gas law variables: V, T, and P  But also includes R – gas constant and n for # of moles.

4. Ex. 5.0 g of neon is at 256 mm Hg and at a temperature of 35º C. What is the volume?  P = 256 mm of Hg  T = 35 + 273 = 308K  V = ?  n = 5.0g  Moles  R = select the correct R  But we must convert mm of Hg to Atm. See work on board

5. Ex 2. What is a gas’s temperature in Celsius when it has a volume of 25L, 203 mol, 143.5 atm?  P = 143.5atm  T = ?  V = 25L  n = 203mol  R = select the correct R See work on board

6. Ex 3. Find the volume, in mL, when 7.00 g of O 2 and 1.50 g of Cl 2 are mixed in a container with a pressure of 482 atm and at a temperature of 22º C.  P = 482atm  T = 22 + 273 = 295K  V = ?  n = total moles  R = select the correct R See work on board